I don't know if this is intended or not, but I noticed the other day that on my squads training server, when I was attacking a SA-10, defended by several SA-15's, that the SA-15's didn't react to my HARMS if fired from POS RUK mode, yet if fired from HAS mode did?
I presume the mode fired shouldn't make a difference with regard to that...
4 HARMS fired in HAS mode, all shot down,
Exactly the same target and approach, but fired in POS mode, all four not intercepted, SA-15's don't react at all.